C + + arrays

1. Definition of arrays

An array is represented by a set of values, for example:

Char arr[10];

Arr is an array name, and a char is an array type. Indicates that there are 5 char types of data.

The meaning of an array is equivalent to arranging n variables of the same type.

2. Length of the array

The length of the array is specified in brackets and must be an integer constant.

such as: int arr[12];

You cannot use a variable to represent the length of an array. For example:

int size=12;

int att[size];

This writing is wrong.

3. Initial value of the array

You can specify an initial value for an element when you define an array.

Example: Char arr[5]={90,91,92,93,94};

Syntax requirements: Use a semicolon after curly braces, curly braces. Elements are separated by commas.

You can specify an initial value, or you can specify a partial initial value

4. Length of the array

Use sizeof to get the size of the array length

int arr [100];

int size=sizeof (arr);

5. Two-dimensional array

Type name [N][m];

6. Initialization of two-D arrays

int a[4][3]

{

{11,12,13},

{11,12,13},

{11,12,13},

{11,12,13},

}

C + + arrays